Mounting for abrasive wheels or the like



Jan. 29, 1929. 1,700,331

I a. w. PERKS MOUNTING FOR ABRASIVE WHEELS OR THE LIKE" Filed Nov. 22, 1926 I N VEN TOR. Q oregs W, fZw/ns:

ATTORNEYS.

Patented Jan. 29, 1929.

hairs s'r'rss 1,700,331 Ftlfili.

enonen w. PEBKS, or AKRON, onto, assre-nonro rian enoncn w. PE-RKS COMPANY,

or AKRGN, onto, A con-researc or UHIO.

MOUNTING FOR ABEASI'VE VIHEELS 01% THE LIKE.

Application filed November 22, 1926. Serial No 149,829.

This ii'ivention relates to anew and improved form of mounting for abrasivewheels or similar objects, the specific purpose of the invention being to provide an improved inping device for a Wl'lGOl of this type which Will securely hold and clamp a Wheel so that in the event of fracture the tions or iginents of the Wheel will be retained and Will not fly out. With the u o of the p. invention, it is possible to sarely and secui clamp the abrasive Wheel by means Which ill insure the safe operation thereof at high spa is. f 1

lhe suri'aces of abrasive Wheels are ular, being formed with numerous minute elevations and depressions and the invention ut lizes a form of clamping plate or disk which will securely grip therou h surfaces of the Wheels. The specific desc tron the invention Will be given in connection with drawings illustrating preferred forms of the invention.

Figure 1 is a side elevation of an abrasive Wheel;

Figure 2 is a section through the center of the Wheel.

Figure 3 is an enlarged View of a section or the Wheel and a clamping plate; and

Figure l is a view similar to Figure 8 but showing a modified form thereof.

In the drawings, the numeral 1 represents the usual power shalt upon which the abra sive Wheel 2 is mounted, the form shown in lligures 1 to 3 inclusive including two clamping plates mounted on either side of the wheel and cramped securely by a nut 4C. These plates are preferably lOlTD ed With raised annular bearing surfaces 5 about thin outer peripheries so that the pressure is concentrated near the periphery of the Wheel. Between the plates and the Wheel are placed thin metallic disks or secondary plates 6, the surfaces 01 the disks Which contact the Wheel being provided elevations and depressions Which correspond to and are commensurate With the irregularities on the surface of the Wheel. Figure 3 is an enlarged vieW in Which the irregularities upon the wheel and in the surface of the disks have been magnified to such extent as to illustrate the manner in which the elevations and depressions mesh When the pressure is applied to the clamping plates.

The operation of the device Will be apparent from the description and disclosure which ness, or the stone has with minute irregularities or has been given, it being noted that the inte locking of the two roughened surfaces giv a firm anchorage for the Wheel and "l1" merits or sections thereoi cruinot ny out or mounting. V

'l he roughened upon the disks ina y be obtained in a nu 1b of ways, for example, by knurling, or cutting a fine groove or grooves in the face of the disk. A. spiral groove, s ich as found upon the surface of a lionograph disk has been found to operate satisfactorily for the purpose. lhe depths and extent of the irregularities may be varied but s iould preferably be comparable to the depths and extent or the irregularities upon the face of the Wheel so a substantially complete nesting will be obtained.

in the form shown in Figure 4, the irregularities or projections and depressions are formed directly upon the surface of the clamping" plate 3, rather than upon a separate disk. This form of invention will operate in the same manner as the other form shown. The former is suitable for use With old Wheel mountings.

Attempts have been inadein the prior art to secure an etlcctive mounting providing roughened clamping plates, but these have not been entirely successful, because the plates have been roughened Without regard the result has been that the frictional contact between the plates and the Wheel has been lessened rather than increased by the roughbeen weakened by grooving it deeply receive the projections on the plate.

lit has also been proposed to use clan'ipingplates of comparatively solt materials, such as lead or Wood, but these have not been so effective because the projections on the races of a broken part of a stone Will pull through this material under the action of centrifugal force.

It is to be understood that the present invention is directed to the use of the usual clamping plates or Washers most generally of steel or other comparatively hard material and preformed by roughening in such a. Way

the irregularities will mate and thereby eurely retain the wheel in position when clamping pr ssure '2; applied, the pressure being confined to narrow annular hands adjacent the periphery of the wheel.

3. T 1e combination with an abrasive wire 1 having characteristic minute elevations and depressions in its surface, of a comparatively hard metallic plate having preformed minute elevations and depressions in surface placed against the surface of the Wheel, and

means to exert clamping pressure thereon "for causing interlocking of such elevations and depressions.

V e. The con'ihination with an abrasive Wheel having characteristic minute elevations and depressions in its surface, of a comparatively hard metallic plate havi ng preformed minute elevations and depressions in its surface placed against the surface of the Wheel, and means to exert clamping pre vre thereon in narrow annular bands adjae nt the periphery of the Wheel for cansii'ip; interlocking; of such elevations and depressions.

A mounting; tor abrasive wheels, eomprising a con'iparatively hard plate having preformed minute irregularities comparable with the ehara ristie irregularities of the sin-fare of the wheel, and means to clar plate and Wheel toget'r er so that the irregu la; ties Will mate and thereby securely retain the Wheel in position when clamping pressure is applied.

GEORGE W. PERKS. 

